Karlo Đelmiš

I Solve Expensive Problems

I bridge the gap between Grid Physics and High-Frequency Trading. With a Master's in Energy Engineering and years of building fintech infrastructure, I architect systems that handle millions in transaction volume with 99.999% uptime.

My work spans real-time settlement engines, prediction market match-engines, and Virtual Power Plant (VPP) control systems. I specialize in the intersection where milliseconds matter and failure is not an option.

99.999%Uptime SLA

$5.5M+Funding Supported

<1msTick-to-Trade

Core Stack

GoDistributed SystemsgRPCPostgreSQLTimescaleDBRedisAWSDockerKubernetes

The Challenge

Scaling a marketplace payment engine for Enterprise clients while maintaining regulatory compliance and handling high transaction volumes across multiple currencies.

The Solution

Architected a Schema-First BFF layer using OpenAPI specifications, implemented custom RBAC middleware for granular permission control, and designed event-driven settlement pipelines with PostgreSQL and Redis.

The Impact

✓Supported $5.5M Series A funding round
✓Reduced integration defects by 40% through schema validation
✓Maintained 99.999% uptime across payment infrastructure
✓Enabled 3x faster Enterprise client onboarding

The Challenge

Building a prediction market match-engine capable of sub-millisecond tick-to-trade latency while handling concurrent order book mutations without race conditions.

The Solution

Replaced Redis locking with custom in-memory B-Trees optimized for order book operations. Implemented lock-free concurrency patterns in Go using atomic operations and channel-based coordination. Built Redis shadow ledgers for position reconciliation.

The Impact

✓Achieved deterministic execution with near-zero network overhead
✓Sub-millisecond tick-to-trade latency
✓Zero race conditions in concurrent order matching
✓Real-time position reconciliation across distributed nodes

High-Performance Go Architect

I Solve Expensive Problems

Core Stack

Flagship Case Studies

Trustap

The Challenge

The Solution

The Impact

Polymarket Engine

The Challenge

The Solution

The Impact

Let's Build Something